the paint SHOULD come out the same but as hayley said it CAN come out different.

Agree its normally basecoat that comes out different if ur not careful which is why alot of specialist colours companys like to do the shuts first then blow the whole car over with all the closures on ie doors etc.

End of the day if u cant do it all at once and its the same batch u should be ok, u just have to make sure that u spray at the same pressure and keep to the same distance as the pressure difference can affect how paint is atomised